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Upper slice of Canaan Mountain Schist

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Dark-gray to silvery, generally rusty weathering, medium- to coarse-grained, well-foliated, massive to well-layered schist and schistose gneiss, composed of quartz, plagioclase, biotite, muscovite, and generally garnet and sillimanite; also layers of amphibolite.
State Connecticut
Name Upper slice of Canaan Mountain Schist
Geologic age Cambrian?
Lithologic constituents
Major
Metamorphic > SchistDark-gray to silvery, generally rusty weathering, medium- to coarse-grained, well-foliated, massive to well-layered schist and schistose gneiss, composed of quartz, plagioclase, biotite, muscovite, and generally garnet and sillimanite.
Metamorphic > GneissDark-gray to silvery, generally rusty weathering, medium- to coarse-grained, well-foliated, massive to well-layered schist and schistose gneiss, composed of quartz, plagioclase, biotite, muscovite, and generally garnet and sillimanite.
Minor
Metamorphic > Amphibolite
Comments Part of Western Uplands; Proto-North American (Continental) Terrance - Displaced Iapetus Terrane
References

Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 1:125,000.
NGMDB product
Counties Litchfield